KR100726174B1 - Apparatus for processing function of mac layer of ap and method for processing data thereof - Google Patents

Abstract

An apparatus for processing a function of a MAC(Media Access Control) layer of an access point(AP) and a method for processing data thereof are provided to reduce time required in processing the function of the MAC layer in a portable internet system, by separately processing the function of the MAC layer in a scheduler and a DSP. In an apparatus for processing a function of a MAC layer of an access point(AP) of a portable internet system, a scheduler(210) schedules uplink and downlink, and generates an MAC PDU(MAC Protocol Data Unit) of downlink data to be transmitted to a terminal(100), and assembles an MAC PDU of uplink data transmitted from the terminal. A DSP(Digital Signal Processor)(220) processes the MAC PDU generated from the scheduler and then transmits the processed MAC PDU to the terminal, and processes the uplink MAC PDU transmitted from the terminal and then transfers the processed uplink MAC PDU to the scheduler.

Description

A function processing apparatus of the base station MAC layer and a data processing method thereof {APPARATUS FOR PROCESSING FUNCTION OF MAC LAYER OF AP AND METHOD FOR PROCESSING DATA THEREOF}

1 is a diagram illustrating a base station MAC layer.

2 is a diagram illustrating a high-speed portable Internet system to which the present invention is applied.

3 is a diagram illustrating a function processing apparatus of a base station MAC layer of a high speed portable Internet system according to an exemplary embodiment of the present invention.

4 is a diagram illustrating timing of a function processing apparatus of a base station MAC layer in a high speed portable Internet system according to an embodiment of the present invention.

FIG. 5 is a detailed diagram of the interface memory shown in FIG. 3.

FIG. 6 is a diagram illustrating control timing for a function processing apparatus of a base station MAC layer in a wireless portable Internet system according to an embodiment of the present invention to receive uplink data.

7 is a diagram illustrating a process of processing downlink data in a function processing apparatus of a base station MAC layer of a high-speed portable Internet system according to an embodiment of the present invention.

8 is a diagram illustrating a process of processing uplink data in a function processing apparatus of a base station MAC layer of a high-speed portable Internet system according to an embodiment of the present invention.

The present invention relates to a function processing apparatus of a base station MAC layer and a data processing method thereof, which partially include functions of a privacy sublayer and a MAC common sublayer in a portable Internet system.

IEEE 802.16e is basically a standard that supports Metropolitan Area Network (MAN), and refers to an information communication network covering an intermediate area between a local area network (LAN) and a wide area network (WAN). In addition, a wireless MAN (Wireless MAN) based on a fixed broadband wireless access (BWA), which forms a wireless network and provides a communication service, has been proposed, which is named IEEE 802.16 Wireless MAN. In recent years, with the increase of users who want to transmit and receive data while moving, a portable Internet system (WiBro: Wireless Broadband or HPI: High-speed Portable Internet) based on such a broadband wireless access network has been provided. The portable Internet system uses wireless transmission technology that guarantees spectrum usage efficiency in the 2.3 GHz frequency band, and images of various types of IP-based wireless data services (e.g. streaming video, FTP, mail, chat) provided by the wired Internet. And a 3.5 generation mobile communication system providing high speed packet data transmission.

The base station MAC layer of the portable Internet system performs the main functions required for system access and data transmission such as base station initialization, uplink and downlink data scheduling, and data encryption and decryption. The base station MAC layer is divided into a specific service convergence sublayer (SSCS), a MAC common part sublayer (MAC CPS), and a privacy sublayer (PS) as shown in FIG. Can be divided.

SSCS receives the data received through the Convergence Sublayer Service Access Point (CS SAP) from the external IP network and the MAC Service Data Unit (MAC SDU) data received through the MAC Data Service Access Point (MAC SAP). It performs the role of converting / mapping. In addition, it performs a role of mapping SDUs received from an external IP network with appropriate MAC service flows and CIDs, and performs payload header suppression.

MAC CPS handles the main functions associated with most system connections. For example, connection establishment / management, QoS management of specific MAC connections, automatic repeat request (ARQ) function, scheduling, and MAC PDU configuration.

PS provides authentication, security key exchange, and encryption. Data and physical layer control and statistics collection are transmitted between the MAC CPS and the physical layer (PHY) via the PHY SAP.

The physical layer defines a frequency band, a modulation scheme, an error correction technique, synchronization between a transmitter and a receiver, a data rate, a frame structure, and the like for wireless transmission of data and control signals.

On the other hand, in a high-speed wireless portable Internet system aiming at a data rate of 50 Mbps, a processing speed of a high speed MAC layer is required. However, when all the functions of the above-described base station MAC layer are processed by the scheduler, which is a higher layer in the base station, it takes a lot of time to process the functions of the MAC layer, which causes a problem in that the processing speed is lowered.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a base station MAC function processing apparatus and its data processing method capable of reducing the time required to process a function of the base station MAC layer in a portable Internet system.

According to one aspect of the present invention, there is provided an apparatus for processing a function of a MAC layer in a base station of a portable Internet system. The apparatus comprises: a scheduler for scheduling uplink and downlink data, generating a MAC Protocol Data Unit (MAC PDU) of downlink data to be transmitted to a terminal, and combining MAC PDUs of uplink data transmitted from the terminal; And a DSP (Digital Signal Processor) for processing the MAC PDU generated from the scheduler and transmitting the MAC PDU to the terminal and processing the uplink MAC PDU transmitted from the terminal to the scheduler.

According to another aspect of the present invention, a method for processing uplink data between a scheduler and a modem in a base station of a portable Internet system is provided. The method includes the steps of: a) extracting an uplink map using parameters by scheduling of the scheduler; b) extracting a MAC PDU of the uplink data transmitted by the terminal through the modem using the extracted uplink map; c) classifying and storing the MAC PDUs checked for errors in the extracted MAC PDUs according to types; And d) transmitting the MAC PDU from the stored MAC PDU to the scheduler.

According to still another aspect of the present invention, a method for processing downlink data between a scheduler and a modem in a base station of a portable Internet system is provided. The method includes the steps of: a) generating and encoding a downlink map and an uplink map every frame using the parameters of the scheduler scheduling; b) generating an error check field for a MAC PDU of downlink data transmitted from the scheduler; And c) concatenating MAC PDUs of the same burst in which the error check field is generated, constructing the encoded uplink map in front of the MAC PAU, and transmitting them to the terminal through the modem.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification. In addition, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless otherwise stated.

Now, a base station MAC function processing apparatus and a data processing method thereof of a high-speed portable Internet system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The base station MAC layer described below is a MAC layer including some functions of a privacy sublayer and a MAC common sublayer.

2 is a diagram illustrating a high-speed portable Internet system to which the present invention is applied.

As shown in FIG. 2, the portable Internet system includes an access terminal (AT) 100, an access point (AP) 200, a packet access router (PAR) 300, and a backbone network. Service Provider's IP Network (400).

The AT 100 is an endpoint of a wireless channel and communicates with the AP 200 in an orthogonal frequency division multiple access (OFDMA) scheme according to a wireless access standard, and a wireless access standard at a frequency of 2.3 GHz in order to transmit and receive high-speed packet data. Performs a wireless channel transmission and reception function according to.

The AP 200 is a device for connecting a wireless network and a wired network, and provides a wireless packet data service directly to the AT 100 through a wireless interface at a wired network end. That is, a function of transmitting information received from the AT 100 to the PAR 300 to perform the wired / wireless channel conversion function or converting various information received from the PAR 300 into a wireless signal and transmitting the information to the AT 100. Do this.

The PAR 300 is connected to and manages a plurality of APs 200, and performs a handover control function to ensure high-speed mobility in the PAR 300. To this end, the AP 200 and the PAR 300 are connected based on the IP protocol, and are configured based on a Gigabit Ethernet switch for high-speed packet transmission, and include FA control, handover, authentication, packet routing, billing data collection and transmission, and diamond. It collects and transmits information about meter client, diameter base and operation maintenance.

The provider IP network 400 connects the PARs 300 and may include an authentication authorization accounting (AAA) server 410 and a home agent (HA) 420 and servers for other specific purposes.

The AAA server 410 is a network component that performs authentication, authorization verification, and charging for the user and the AT 100 in order to access a mobile Internet network and provide a service to a legitimate user. AAA server 410 uses a standard protocol (diameter) protocol in progress by the Internet Engineer Task Force (IETF), an international standards organization. This diameter protocol enables authentication, authority verification and billing information transmission by interworking between servers.

The HA 420 is connected to the operator IP network 400 to perform a mobile IP service function. That is, it is a network component that supports IP mobility of the AT 100 in a home network.

Interaction with the AT 100, the AP 200, the PAR 300, and the operator IP network 400 is realized by the manner in which control messages are defined. U _h interface between AT 100 and AP 200, A _h interface between AP 200 and PAR 300, P _h interface between PAR 300 and PAR 300, PAR 300 And an I _h interface between the AAA server 410 and the HA server 420 of the operator IP network 400. In addition, the portable Internet system may be interworked with another Internet network, a cellular network, or a wireless LAN network through the operator IP network 400.

3 is a diagram illustrating a function processing apparatus of a base station MAC layer of a high speed portable Internet system according to an exemplary embodiment of the present invention.

As illustrated in FIG. 3, the apparatus 200a for processing a base station MAC layer includes a scheduler 210, a digital signal processor (DSP) 220, and a MAC field programmable gate array (MAC FPGA) 230.

The scheduler 210 processes downlink to be transmitted to the AT 100 and uplink data transmitted from the AT 100. Specifically, the scheduler 210 schedules downlink and downlink data, transfers the scheduled parameters to the DSP 220, generates downlink data to be transmitted to the AT 100, that is, a MAC PDU, and generates the downlink data to the DSP 220. Perform the function of passing. In addition, it performs a function of combining uplink data, that is, MAC PDUs transmitted from the AT 100 through the DSP 220. In addition, it performs functions such as ranging code processing for uplink data, channel quality indicator channel (CQICH) channel information processing, and AQR processing.

The MAC DSP 220 includes a downlink processor 221 (hereinafter referred to as a "DL processor"), an uplink processor 222 (hereinafter referred to as an "UL processor"), a control message processor 223, and a measurement information processor ( 224, PCI interface 225, interface memory 226, and external interface memory 227.

The DL processing unit 221 generates an uplink / downlink map (hereinafter, referred to as “UL / DL MAP”) using parameters scheduled in the current frame from the scheduler 210 and downlink data from the scheduler 210. Downlink MAC Protocol Data Unit (MAC PDU) data is received to generate an error check field, HEC (Header Error CRC8) and CRC32 (Cyclic Redundancy Check 32), for each MAC PDU to connect MAC PDUs to be in the same burst. Along with the DL MAP to the AT 100 via the modem 240. In general, transmission of a downlink frame begins with one preamble and an FCH, DL MAP and MAC PDU order. Here, MAP includes frame configuration information, DL MAP includes control information for the DL burst allocated to the AT (100), UL MAP is used for uplink control to send data to the AT 100 in uplink Contains information.

In addition, the DL processing unit 221 receives a modem control message necessary for demodulating the uplink data transmitted from the AT 100 in the modem 240 from the scheduler 210 and transmits the received modem control message to the modem, which is included in the modem control message. The modem control information is stored and managed to allow the UL processing unit 222 to classify using the control information. Accordingly, the DL processing unit 221 includes a DB for storing this modem control information. In this case, the DB may have a double buffer or more buffers in consideration of the time point at which the AT 100 receives UL MAP and transmits uplink data.

The UL processing unit 221b searches for bursts of several ATs 100 in the current frame, checks whether there is a MAC PDU of uplink data in the burst, and then performs HEC and CRC32 checks to determine whether an error occurs. After performing classification according to the type of MAC PDU, the MAP PDU to be transmitted in the current frame is transmitted to the scheduler 210.

The control message processor 221c processes a cell setting and broadcast information setting related command (control message) transmitted from the scheduler 210.

The measurement information processing unit 221d may include various status information of each AT 100 measured from the modem 240 (for example, ranging code, channel status report information, and ACK response channel information for HARQ (Hybrid Automatic Repeat reQuest)). Etc.) to the scheduler 210.

PCI interface 225 provides an interface with scheduler 210.

The interface memory 226 provides an interface with the scheduler 210, and stores information transmitted and received with the scheduler 210.

External interface memory 227 provides an interface with MAC FPGA 230.

The MAC FPGA 230 performs a control function for timing with the modem 240 and may use a DPRAM memory as an interface memory 231 with the MAC DSP 220.

4 is a diagram illustrating timing of a function processing apparatus of a base station MAC layer in a high speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 4, the scheduler 210, the DSP 220, and the MAC FPGA 230 share five segments in units of 1 ms. In this case, 5 ms corresponds to one frame length of the IEEE802.16 standard.

The scheduler 210 processes downlink data in the first and second segments and transmits the downlink data to the DL processing unit 221 of the DSP 220 and receives the uplink data from the UL processing unit 222 of the DSP 220. Process on the fifth segment.

The DL processor 221 receives downlink data processed in the first and second segments from the scheduler 210, processes the downlink data within 1 ms of the third segment, and transmits the processed downlink data to the modem 240 through the MAC FPGA 230. . The UL processor 222 receives uplink data processed in the frame start point 2 ms, that is, the first and second segments, through the modem 240 and the MAC FPGA 230, and processes the uplink data in the segment of the fourth 1 ms. Forward to 210. Each of the control message processing unit 223 and the measurement information processing unit 224 operates in one of the remaining segments except the DL processing unit 221 and the UL processing unit 222 in five segments of 1 ms in the DSP 220. . In FIG. 4, the control message processor 223 processes the control message in the first segment, and the measurement information processor 224 transmits the measurement information of the terminal to the scheduler 210 in the fifth segment. Shown.

The MAC FPGA 230 and the modem 240 perform demodulation and channel decoding on the first and second segments of the uplink data transmitted from the AT 100, and then transmit the uplink data to the UL processor 222. The downlink data processed in the third segment is received from the processor 221, and channel encoding and modulation are performed in the fourth and fifth segments to be transmitted to the AT 100.

FIG. 5 is a detailed diagram of the interface memory shown in FIG. 3.

As shown in FIG. 5, the DL / UL control information for controlling the DSP 220 in the scheduler 210 is transmitted through the interface memory 226 to the DL processor 221a, the UL processor 221b, and the control message processor 221c. And the measurement information processing unit 221d.

The interface memory 226 may be largely divided into a DL control information related memory area and a UL control information related memory area. The DL control information related memory areas include a control register area (DSP Control Registers) 226a, a DL request area (226b), a DL-UL MAP area (DL-UL MAP Area) 226d, and a DL data area (DL Data). 226f), and the UL control information related memory area includes a UL request area (226e), a UL response area (226c), and a UL data area (UL data area, 226g). .

First, in the DL control information related memory area, the control register area 226a is an area for managing the software version and each area of the DSP 220, and the DL request area 226b receives an initialization message related to cell setup and broadcast information. This is an area for transferring to the control message processor 223. The DL-UL MAP area 226d is an area for transmitting the parameter transmitted from the scheduler 120 to the DL processing unit 221 to generate the UL / DL MAP, and the DL data area 226f is transmitted to the AT 100. An area for transmitting the data burst to the DL processing unit 221. Here, the DL request area 226b may be divided into N segment areas to simultaneously execute N commands from the scheduler 210 in a circular queue manner.

In the UL control information related memory area, the UL request area 226e is an area for transmitting ranging code information, CQICH information, H-ARQ ACK information, UL sounding channel information, etc. to the scheduler 210, and a UL response. The area 226c is an area for transmitting a response to the command (cell setup and broadcast information related initialization message) transmitted from the scheduler 210 through the DL request area 226b. The UL data area 226g is an area for classifying and delivering user data transmitted from the AT 100 through the modem 240. In this case, the UL data area 226g includes five divided areas according to the type of MAC PDU and an area for storing information on the MAC PDU having a CRC error. The five divided areas may include a UL data PDU area, a BW allocation PDU area, a Basic Mac message area, a Primary Mac message area, and a Secondary Mac message area.

FIG. 6 is a diagram illustrating control timing for a function processing apparatus of a base station MAC layer in a wireless portable Internet system according to an embodiment of the present invention to receive uplink data.

As shown in FIG. 6, the [k + 1] UL MAP to be delivered to the AT 100 in the [k + 1] th frame is transmitted by the DL processing unit 221 using the parameter transmitted from the scheduler 210 one frame before. UL MAP is generated. The DL processing unit 221 transmits this [k + 1] UL MAP to the MAC FPGA 230 and the modem 240, and the MAC FPGA 230 and the modem 240 transmit the [k + 1] th frame in the [k + 1] th frame. +1] The UL MAP is received and transmitted to the AT 100 through a wireless channel. Then, the AT 100 receives the UL MAP at the [k + 1] th frame time point. The AT 100 generates UL data using the received [k + 1] UL MAP information and transmits the corresponding UL data to the modem 240 in the base station in the [k + 2] th frame. The modem 240 demodulates the corresponding UL data using the [k + 1] UL MAP in the [k + 2] th frame. At this time, the scheduler 210 transmits the modem control message to the DL processing unit 221 in the [k + 2] th frame, and the DL processing unit 221 transmits the modem control message through the MAC FPGA 230 in the same frame. Is passed to 240. The modem 240 demodulates the corresponding UL data using this modem control message.

Meanwhile, the DL processing unit 221 stores control information in the modem control message received from the scheduler 210 in the [k + 2] th frame in the DB, and then goes to the UL processing unit 222 in the [k + 3] th frame. To pass. The UL processor 222 interprets the PDU using burst information of each terminal included in the [k + 2] th modem control message, classifies the interpreted PDU according to the type, and stores the analyzed PDU in the same frame to the scheduler 210. send.

7 is a diagram illustrating a process of processing downlink data in a function processing apparatus of a base station MAC layer of a high-speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 7, the DL processing unit 222 of the DSP 220 operates every frame and first stores a start time (Start_time) before starting the operation. Then, it is checked whether there is a parameter for generating DL MAP or UL MAP delivered from the scheduler 210 in the DL-UL MAP region 226d (S704). At this time, if there is a parameter for generating a DL MAP or UL MAP delivered from the scheduler 210, the MAP is generated using the parameters for generating the DL MAP or UL MAP delivered from the scheduler 210 and the Frame Configuration Header And MAP encoding (S706). In this way, when the DL processing unit 222 finishes the MAP encoding, the DL processing unit 222 checks whether there is a DL burst to be transmitted to the AT 100 in the DL data area 226f (S708). At this time, if there is a DL burst, it is checked whether HEC and CRC32 are generated for the PDUs present in each burst (S710), and HEC and CRC32 are generated for the PDUs present in each burst (S712). The PDUs of the same burst are concatenated (S714). This operation is performed on all bursts (S708 to S714), and the corresponding DL burst is transmitted to the modem 240 through the MAC FPGA 230.

Meanwhile, in order to perform the operation described with reference to FIG. 6, the DL processing unit 222 sets a DL modem control register when there is no DL burst to be transmitted to the AT 100 in the DL data area 226f in step S708. (S716) The control information in the modem control message is stored in DB [0] or DB [1], and the DB counter is incremented by 1 (S718 to S722). Thereafter, the UL modem control register is set (S724). At this time, when the UL processing unit 222 receives the [k + 3] th frame after processing the UL data transmitted in the [k + 2] th frame from the AT 100 in the same frame in the modem 240, DL. The processor 221 must transmit the modem control message received from the scheduler 210 in the [k + 2] th frame to the modem 240 in the same frame, and to the UL processor 222 in the [k + 3] th frame. Since it should be transmitted, control information in this modem control message should be saved in DB. In addition, since the UL processing unit 222 receives UL data one frame after the AT 100 transmits UL data, the DL processing unit 221 has a double buffer type DB. If the UL processing unit 222 receives the UL data after two frames at the time when the AT 100 transmits the UL data, it must manage the DB using three buffers.

On the other hand, if there is no DL MAP or UL MAP delivered from the scheduler 210 in step S704 or if the UL modem control register is set in step S726, the DL processing unit 221 ends the operation. At this time, the end time End_time is stored (S726), and it is checked whether the difference between the end time and the start time exceeds 1 ms (S728). If the difference between the end time and the start time exceeds 1 ms, an error message is displayed (S730).

8 is a diagram illustrating a process of processing uplink data in a function processing apparatus of a base station MAC layer of a high-speed portable Internet system according to an embodiment of the present invention.

As shown in FIG. 8, the UL processing unit 222 of the DSP 220 operates every frame and first stores a start time (Start_time) before starting the operation (S802). As described with reference to FIG. 7, the UL MAP for the previous frame is extracted using control information in the modem control message stored in the corresponding DB of the DL processor 221 in relation to the UL MAP (S804 to S808). In addition, it is checked whether the UL burst exists from the control information in the modem control message (S810). In this case, if there is an UL burst, check whether there is a MAC PDU in the UL burst (S812), check the HEC / CRC32 for the MAC PDU in each burst by the number of UL bursts, and then select five MAC PDUs for the extracted MAC PDU. The data is stored separately in the UL data area 226g according to the PDU type (S816 to S818). After processing the MAC PDUs for all the bursts in this manner, the MAC PDUs present in the current frame are transferred to the scheduler 210 through the UL data region 226g (S820). After that, the UL processing unit 222 ends the operation. At this time, the end time End_time is stored (S822), and it is checked whether the difference between the end time and the start time is more than 1 ms (S824). If the difference between the end time and the start time exceeds 1 ms, an error message is displayed (S826).

The embodiments of the present invention described above are not implemented only through an apparatus and a method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation can be easily implemented by those skilled in the art from the description of the above-described embodiments.

The above embodiments are intended to illustrate the present invention, the scope of the present invention is not limited to the embodiments, it can be modified or modified by those skilled in the art within the scope of the invention defined by the appended claims.

By the above-described configuration, it is possible to efficiently separate and perform the functions of the MAC layer in processing data at the base station, thereby reducing the interface time with the modem.

Claims (13)

An apparatus for processing a function of a MAC layer in a base station of a portable internet system, A scheduler for scheduling uplink and downlink data, generating a MAC Protocol Data Unit (MAC PDU) of downlink data to be transmitted to a terminal, and combining MAC PDUs of uplink data transmitted from the terminal; And Digital Signal Processor (DSP) which processes the MAC PDU generated from the scheduler and transmits the MAC PDU to the terminal and processes the uplink MAC PDU transmitted from the terminal to the scheduler. Function processing apparatus of the base station MAC layer comprising a. The method of claim 1, The DSP, A downlink map and a downlink map are generated based on a parameter according to the scheduling result, an error check field is generated for the MAC PDU of the downlink data, and the MAC PDU is generated. DL processing unit for concatenating and transmitting to the terminal; And The UL processor for classifying and storing the MAC PDUs whose errors are checked for the MAC PDUs of the uplink data transmitted from the terminal according to the type, and transmitting the MAC PDUs of the corresponding uplink data to the scheduler. Function processing apparatus of the base station MAC layer comprising a. The method of claim 2, The DL processing unit, A database that stores modem control information corresponding to the uplink map for classifying MAC PDUs of demodulated uplink data. Function processing apparatus of the base station MAC layer comprising a. The method of claim 2, The DSP, A control message processing unit processing a cell setting and broadcast information related command transmitted from the scheduler; And Measurement information processing unit for transmitting the status information of the terminal measured by the modem for demodulating the MAC PDU of the uplink data to the scheduler Function processing apparatus of the base station MAC layer further comprising. The method of claim 4, wherein The DSP, Interface memory for storing information transmitted and received with the scheduler and interface with the scheduler Function processing apparatus of the base station MAC layer further comprising. The method of claim 5, The interface memory, A DL request area for transmitting a cell setting and broadcast information related command transmitted from the scheduler to the control message processor; A DL-UL MAP region for transmitting a parameter according to a result of the scheduling transmitted from the scheduler to the DL processing unit; A DL data area for transmitting the MAC PDU of downlink data generated by the scheduler to the DL processor; A UL request region for transmitting the information of the terminal measured by the measurement information processor to the scheduler; A UL response area for transmitting a response to the cell setting and broadcast information related commands of the scheduler to the scheduler; A UL data area for transmitting MAC PDUs of the uplink data classified and stored from the UL processor to the scheduler; And Control register area for managing each area Function processing apparatus of the base station MAC layer comprising a. The method of claim 6, And the DL request area is divided into a plurality of segment areas of a circular queue method. The method of claim 4, wherein The DL processing unit, the UL processing unit, the control message processing unit and the measurement information processing unit is a function processing apparatus of the base station MAC layer which is divided and operated in each of five segments of 1 ㎳ unit. A method of processing uplink data between a scheduler and a modem in a base station of a portable internet system, a) extracting an uplink map by using a parameter by scheduling of the scheduler; b) extracting a MAC PDU of the uplink data transmitted by the terminal through the modem using the extracted uplink map; c) classifying and storing the MAC PDUs checked for errors in the extracted MAC PDUs according to types; And d) transmitting the MAC PDU from the stored MAC PDU to the scheduler; Data processing method comprising a. The method of claim 9, Storing a start time before step a) and storing an end time after step d); And Displaying an error message if the difference between the start time and the end time exceeds a predetermined time; Data processing method further comprising. A method of processing downlink data between a scheduler and a modem in a base station of a portable internet system, a) generating and encoding a downlink map and an uplink map every frame by using the scheduling parameter of the scheduler; b) generating an error check field for a MAC PDU of downlink data transmitted from the scheduler; And c) concatenating MAC PDUs of the same burst in which the error check field is generated, constructing the encoded uplink map in front of the MAC PAU, and transmitting them to the terminal through the modem; Data processing method comprising a. The method of claim 11, d) transmitting modem control information corresponding to the uplink map encoded in step a) to the modem; And e) storing the modem control information in a database of corresponding frames; Data processing method further comprising. The method of claim 12, Storing a start time before step a) and storing an end time after step e); And Displaying an error message if the difference between the start time and the end time exceeds a predetermined time; Data processing method further comprising.

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